The chemical name of XPO-4 is glycerol polyoxyethylene ether oleate, with the general molecular formula C₃H₅(OC₂H₄)nOOCC₁₇H₃₃, where the number of ethylene oxide adducts n≈4~20, and the molecular weight ranges from about 1000 to 1500 (varying with the number of EO units). This product belongs to the nonionic surfactant category, with a monoester content ≥90%, diester content ≤5%, and free alcohol ≤1.0%, ensuring high purity and excellent surface activity.
This product exhibits outstanding physicochemical stability: cloud point ≥95°C (1% aqueous solution), showing no demulsification or stratification under high-temperature and high-pressure dyeing conditions; good resistance to hard water, dilute acids, and dilute alkalis, making it suitable for alkaline dyeing processes. It also features low foaming characteristics, reducing foam-related issues in industrial applications. The water content is ≤1.0%, with a high active ingredient content to ensure usage efficiency.
From a safety and environmental perspective, this product has a flash point >150°C, classifying it as a non-flammable liquid; acute oral toxicity LD₅₀ >5000 mg/kg, indicating low acute toxicity; and a biodegradation rate >70% (OECD 301B method), classifying it as readily biodegradable and environmentally friendly.
| Parameter Item | Specification Value |
|---|---|
| Appearance (room temperature) | Light yellow to yellow transparent viscous liquid |
| Ionic type | Nonionic |
| Molecular formula | C₃H₅(OC₂H₄)nOOCC₁₇H₃₃, n≈4~20 |
| Molecular weight | Approximately 1000~1500 (varies with EO number) |
| Density (20°C) | Approximately 1.05 g/cm³ |
| Kinematic viscosity (25°C) | Approximately 300 mPa·s |
| Refractive index (20°C) | Approximately 1.465 |
| Melting point | <0°C |
| Flash point | >150°C (non-flammable liquid) |
| Moisture content | ≤1.0% |
| Hygroscopicity | Hygroscopic |
| Parameter Item | Specification Value |
|---|---|
| HLB value | 13.5 |
| Cloud point (1% aqueous solution) | ≥95°C |
| Surface tension (1% aqueous solution, 25°C) | Approximately 28 mN/m |
| Critical micelle concentration (CMC) | 0.01~0.1 g/L |
| Foaming properties | Low foaming |
| Water solubility | Easily soluble in water and organic solvents |
| Chemical stability | Stable under normal conditions, resistant to hard water, dilute acids, and dilute alkalis |
| Alkali resistance | Good alkali resistance, suitable for alkaline dyeing |
| Parameter Item | Specification Value |
|---|---|
| Active ingredient content | ≥99% |
| Solid content | ≥99% |
| pH value (1% aqueous solution) | 5.0~7.0 |
| pH value (5% aqueous solution) | 5.0~7.0 |
| Acid value | ≤2 mgKOH/g |
| Saponification value | Approximately 30~80 mgKOH/g (varies with EO number) |
| Hydroxyl value | Approximately 50~150 mgKOH/g (varies with EO number) |
| Iodine value | 40~60 gI₂/100g |
| Unsaturation | Approximately 0.5~1.0 mmol/g |
| Monoester content | ≥90% |
| Diester content | ≤5% |
| Free alcohol | ≤1.0% |
| Heavy metals (as Pb) | ≤10 mg/kg |
| Arsenic (As) | ≤2 mg/kg |
| Amine value/Tertiary amine content | None |
| Free phosphoric acid/Phosphate monoester/Phosphate diester/Combined phosphorus | None (this product does not contain phosphorus) |
With an HLB value of 13.5, XPO-4 is a hydrophilic O/W emulsifier, particularly suitable as a leveling agent for high-temperature and high-pressure dyeing of polyester and its blended fabrics with disperse dyes. The recommended dosage is 0.5~2.0 g/L of the dye bath (specific dosage should be optimized based on dye concentration, dyeing depth, and equipment conditions). In industrial emulsification and dispersion fields, it can be used as an emulsifying and dispersing component in formulations such as inks, coatings, and pesticide emulsifiable concentrates. It can also be compounded in chemical fiber finishes to impart good smoothness and cohesion to fibers.